Effective fiber diameter for modeling the acoustic properties of polydisperse fiber networks

Copyright 2017 Acoustical Society of America. This article may be downloaded for personal use only.Any other use requires prior permission of the author and the Acoustical Society of America.The following article appeared in the Journal of the Acoustical Society of America Express Letters (JASA-EL) and may be found at http://dx.doi.org/10.1121/1.4976114.International audienceThe purpose of this research is to determine whether the acoustic properties of polydisperse fibrous medium (PDFM) and bidisperse fibrous medium (BDFM) can be modeled by monodisperse fiber media (MDFM) with an effective fiber diameter. Multi-scale numerical simulations on representative elementary volumes of these media are performed to retrieve the transport and geometrical properties governing their acoustic properties. Results show no significant difference between predictions obtained by PDFM or BDFM, and their corresponding effective MDFM